Host–guest properties of pillar[7]arene towards substituted adamantane ammonium cations†
Abstract
Highly efficient complexation of per-ethylated pillar[7]arene towards 3,5-dimethyl-1-adamantyl ammonium cations is reported as the first example of pillar[7]arene-based molecular recognition. The binding affinity of the resulting inclusion complex is much higher than those for per-ethylated pillar[5,6]arenes with smaller cavities due to the strict size-fit effect.